fix 4 lines with trailing whitespaces - 1984/mullender/README.md

In one case, a <br /> is used to break a line.

in the other 3 cases, where a line break was
not needed, trailing whitespace were removed.

1984/mullender/README.md

@@ -1,9 +1,9 @@
-# The Grand Prize 
+# The Grand Prize
 
-Sjoerd Mullender  
+Sjoerd Mullender<br />
-<https://github.com/sjoerdmullender>  
+<https://github.com/sjoerdmullender>
 
-Robbert van Renesse  
+Robbert van Renesse
 
 ## To build:
 
@@ -290,7 +290,7 @@ main(argc, argv) char **argv;
 	exit(2);
     }
 
-    fseek (fp, (long) sizeof (struct exec), 0); 
+    fseek (fp, (long) sizeof (struct exec), 0);
     printf("/* portable between VAX and PDP11 */\n\n");
     printf ("short main[] = {\n");
     for (;;) {